public static StopCallback GetStopCallback(IList <StopCallback> stopCallbacks, AgentInstanceContext agentInstanceContext)
{
var stopCallbackArr = stopCallbacks.ToArray();
return(new ProxyStopCallback(() => StopSafe(
agentInstanceContext.TerminationCallbackRO, stopCallbackArr,
agentInstanceContext.StatementContext)));
}
public static StatementAgentInstanceFactoryResult Start(EPServicesContext servicesContext, ContextControllerStatementBase statement, bool isSingleInstanceContext, int agentInstanceId, MappedEventBean agentInstanceProperties, AgentInstanceFilterProxy agentInstanceFilterProxy, bool isRecoveringResilient)
{
var statementContext = statement.StatementContext;
// for on-trigger statements against named windows we must use the named window lock
OnTriggerDesc optOnTriggerDesc = statement.StatementSpec.OnTriggerDesc;
String namedWindowName = null;
if ((optOnTriggerDesc != null) && (optOnTriggerDesc is OnTriggerWindowDesc))
{
String windowName = ((OnTriggerWindowDesc)optOnTriggerDesc).WindowName;
if (servicesContext.TableService.GetTableMetadata(windowName) == null)
{
namedWindowName = windowName;
}
}
// determine lock to use
IReaderWriterLock agentInstanceLock;
if (namedWindowName != null)
{
NamedWindowProcessor processor = servicesContext.NamedWindowMgmtService.GetProcessor(namedWindowName);
NamedWindowProcessorInstance instance = processor.GetProcessorInstance(agentInstanceId);
agentInstanceLock = instance.RootViewInstance.AgentInstanceContext.EpStatementAgentInstanceHandle.StatementAgentInstanceLock;
}
else
{
if (isSingleInstanceContext)
{
agentInstanceLock = statementContext.DefaultAgentInstanceLock;
}
else
{
agentInstanceLock = servicesContext.StatementLockFactory.GetStatementLock(
statementContext.StatementName, statementContext.Annotations, statementContext.IsStatelessSelect);
}
}
// share the filter version between agent instance handle (callbacks) and agent instance context
var filterVersion = new StatementAgentInstanceFilterVersion();
// create handle that comtains lock for use in scheduling and filter callbacks
var agentInstanceHandle = new EPStatementAgentInstanceHandle(statementContext.EpStatementHandle, agentInstanceLock, agentInstanceId, filterVersion, statementContext.FilterFaultHandlerFactory);
// create agent instance context
AgentInstanceScriptContext agentInstanceScriptContext = null;
if (statementContext.DefaultAgentInstanceScriptContext != null)
{
agentInstanceScriptContext = AgentInstanceScriptContext.From(statementContext.EventAdapterService);
}
var agentInstanceContext = new AgentInstanceContext(statementContext, agentInstanceHandle, agentInstanceId, agentInstanceFilterProxy, agentInstanceProperties, agentInstanceScriptContext);
var statementAgentInstanceLock = agentInstanceContext.EpStatementAgentInstanceHandle.StatementAgentInstanceLock;
using (Instrument.With(
i => i.QContextPartitionAllocate(agentInstanceContext),
i => i.AContextPartitionAllocate()))
{
using (statementAgentInstanceLock.AcquireWriteLock())
{
try
{
// start
var startResult = statement.Factory.NewContext(agentInstanceContext, isRecoveringResilient);
// hook up with listeners+subscribers
startResult.FinalView.AddView(statement.MergeView); // hook output to merge view
// assign agents for expression-node based strategies
var aiExprSvc = statementContext.StatementAgentInstanceRegistry.AgentInstanceExprService;
var aiAggregationSvc =
statementContext.StatementAgentInstanceRegistry.AgentInstanceAggregationService;
// allocate aggregation service
if (startResult.OptionalAggegationService != null)
{
aiAggregationSvc.AssignService(agentInstanceId, startResult.OptionalAggegationService);
}
// allocate subquery
foreach (var item in startResult.SubselectStrategies)
{
var node = item.Key;
var strategyHolder = item.Value;
aiExprSvc.GetSubselectService(node).AssignService(agentInstanceId, strategyHolder.Stategy);
aiExprSvc.GetSubselectAggregationService(node)
.AssignService(agentInstanceId, strategyHolder.SubselectAggregationService);
// allocate prior within subquery
foreach (var priorEntry in strategyHolder.PriorStrategies)
{
aiExprSvc.GetPriorServices(priorEntry.Key).AssignService(agentInstanceId, priorEntry.Value);
}
// allocate previous within subquery
foreach (var prevEntry in strategyHolder.PreviousNodeStrategies)
{
aiExprSvc.GetPreviousServices(prevEntry.Key)
.AssignService(agentInstanceId, prevEntry.Value);
}
}
// allocate prior-expressions
foreach (var item in startResult.PriorNodeStrategies)
{
aiExprSvc.GetPriorServices(item.Key).AssignService(agentInstanceId, item.Value);
}
// allocate previous-expressions
foreach (var item in startResult.PreviousNodeStrategies)
{
aiExprSvc.GetPreviousServices(item.Key).AssignService(agentInstanceId, item.Value);
}
// allocate match-recognize previous expressions
var regexExprPreviousEvalStrategy = startResult.RegexExprPreviousEvalStrategy;
aiExprSvc.GetMatchRecognizePrevious().AssignService(agentInstanceId, regexExprPreviousEvalStrategy);
// allocate table-access-expressions
foreach (var item in startResult.TableAccessEvalStrategies)
{
aiExprSvc.GetTableAccessServices(item.Key).AssignService(agentInstanceId, item.Value);
}
// execute preloads, if any
foreach (var preload in startResult.PreloadList)
{
preload.ExecutePreload(agentInstanceContext);
}
if (statementContext.StatementExtensionServicesContext != null &&
statementContext.StatementExtensionServicesContext.StmtResources != null)
{
var holder = statementContext.StatementExtensionServicesContext.ExtractStatementResourceHolder(startResult);
statementContext.StatementExtensionServicesContext.StmtResources.SetPartitioned(agentInstanceId, holder);
}
// instantiate
return(startResult);
}
finally
{
if (agentInstanceContext.StatementContext.EpStatementHandle.HasTableAccess)
{
agentInstanceContext.TableExprEvaluatorContext.ReleaseAcquiredLocks();
}
}
}
}
}
public static bool EvaluateFilterForStatement(EPServicesContext servicesContext, EventBean theEvent, AgentInstanceContext agentInstanceContext, FilterHandle filterHandle)
{
// context was created - reevaluate for the given event
var callbacks = new ArrayDeque <FilterHandle>();
servicesContext.FilterService.Evaluate(theEvent, callbacks, agentInstanceContext.StatementContext.StatementId);
try
{
servicesContext.VariableService.SetLocalVersion();
// sub-selects always go first
if (callbacks.Any(handle => handle == filterHandle))
{
return(true);
}
agentInstanceContext.EpStatementAgentInstanceHandle.InternalDispatch();
}
catch (Exception ex)
{
servicesContext.ExceptionHandlingService.HandleException(
ex, agentInstanceContext.EpStatementAgentInstanceHandle, ExceptionHandlerExceptionType.PROCESS,
theEvent);
}
return(false);
}
public static AgentInstanceViewFactoryChainContext Create(IList <ViewFactory> viewFactoryChain, AgentInstanceContext agentInstanceContext, ViewResourceDelegateVerifiedStream viewResourceDelegate)
{
Object previousNodeGetter = null;
if (viewResourceDelegate.PreviousRequests != null && !viewResourceDelegate.PreviousRequests.IsEmpty())
{
DataWindowViewWithPrevious factoryFound = EPStatementStartMethodHelperPrevious.FindPreviousViewFactory(viewFactoryChain);
previousNodeGetter = factoryFound.MakePreviousGetter();
}
ViewUpdatedCollection priorViewUpdatedCollection = null;
if (viewResourceDelegate.PriorRequests != null && !viewResourceDelegate.PriorRequests.IsEmpty())
{
var priorEventViewFactory = EPStatementStartMethodHelperPrior.FindPriorViewFactory(viewFactoryChain);
var callbacksPerIndex = viewResourceDelegate.PriorRequests;
priorViewUpdatedCollection = priorEventViewFactory.MakeViewUpdatedCollection(callbacksPerIndex, agentInstanceContext.AgentInstanceId);
}
bool removedStream = false;
if (viewFactoryChain.Count > 1)
{
int countDataWindow = 0;
foreach (ViewFactory viewFactory in viewFactoryChain)
{
if (viewFactory is DataWindowViewFactory)
{
countDataWindow++;
}
}
removedStream = countDataWindow > 1;
}
return(new AgentInstanceViewFactoryChainContext(agentInstanceContext, removedStream, previousNodeGetter, priorViewUpdatedCollection));
}